prog4 BEGIN	0
:LINKER TEST
:Cross File Linking Test, the first five lines of each program should be identical
	HALT
ext41	ADRC	ext11+ext22+ext33+ext44
ext42	ADRC	ext53+ext32-ext41+ext13
ext43	ADRC	ext21*ext51+ext12+ext42
ext44	ADRC	ext31+ext43+ext13+ext54
	EXTRN	ext21
	EXTRN	ext22
	EXTRN	ext23
	EXTRN	ext24
	EXTRN	ext31
	EXTRN	ext32
	EXTRN	ext33
	EXTRN	ext34
	EXTRN	ext11
	EXTRN	ext12
	EXTRN	ext13
	EXTRN	ext14
	EXTRN	ext51
	EXTRN	ext52
	EXTRN	ext53
	EXTRN	ext54
	AVERT	ext41
	AVERT	ext42
	AVERT	ext43
	AVERT	ext44
	FINSH